201155166 has 24 divisors (see below), whose sum is σ = 458775720. Its totient is φ = 63522576.

The previous prime is 201155153. The next prime is 201155179. The reversal of 201155166 is 661551102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201155153) and next prime (201155179).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293745 + ... + 294428.

It is an arithmetic number, because the mean of its divisors is an integer number (19115655).

Almost surely, 2^201155166 is an apocalyptic number.

201155166 is an abundant number, since it is smaller than the sum of its proper divisors (257620554).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201155166 is a wasteful number, since it uses less digits than its factorization.

201155166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588200 (or 588197 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 201155166 is about 14182.9181059470. The cubic root of 201155166 is about 585.9272955108.

It can be divided in two parts, 20115 and 5166, that added together give a square (25281 = 159²).

The spelling of 201155166 in words is "two hundred one million, one hundred fifty-five thousand, one hundred sixty-six".